On this Topic of Lipogrammatic

Why would this constraint ask for ALL about this to avoid containing this fifth glyph?

This part of your bomb has a topic mainly shown, but also a “SUBMIT” button and a “SUSTAIN” button. Touching “SUSTAIN” will show a dissimilar phrasing. You may touch this with impunity. All wordings will always not contain an unambiguous glyph out of our anglophonic vocabulary.

If this glyph is found, touch “SUBMIT” instantly. Touching “SUSTAIN” if said missing glyph is conspicuous will bring a bad implication and load a distinct topic, with a random glyph missing.

Touching “SUBMIT” will show a glyph on a display that transforms upon an arrow touch. Put said glyph to display what was found by looking at shown wordings. Touch “SUBMIT” again to disarm Lipogrammatic.